function resizeBackground($elem){
    //$('#'+$elem).height($('#content_top').outerHeight());
  }
  
  function thumbsNextPage(){
    $sThumbsAvailable = 0;
    $('#input_button_thumbs_prev').attr('disabled','');
    $('#input_button_thumbs_prev').show();
    
    $iThumbsHeight = $('#thumbs').height();
    $("#thumbs").children().each(function() {
      //alert($(this).position().top);
      $newTop = ($(this).position().top) - ($('#thumbs').height());
      $(this).offset({
                        top:($(this).position().top - $('#thumbs').height()),
                        left: $(this).position().left
                      }
      );
      
      if($(this).position().top==698){
        $sThumbsAvailable = 1;
      }
      else{
        $sThumbsAvailable = 0;
      }
      //alert($(this).position().top);
    });
    if($sThumbsAvailable != 1){
      $('#input_button_thumbs_next').attr('disabled','disabled');
      $('#input_button_thumbs_next').hide();
    }
    else{
      $('#input_button_thumbs_next').attr('disabled','');
      $('#input_button_thumbs_next').show();
    }
  }
  
  function thumbsPrevPage(){
    $('#input_button_thumbs_next').attr('disabled','');
    $('#input_button_thumbs_next').show();
    
    if($("#thumbs").children().position().top < 378){
      $iThumbsHeight = $('#thumbs').height();
      $("#thumbs").children().each(function() {
        //alert($(this).position().top);
        $(this).offset({
                          top:($(this).position().top + $('#thumbs').height()),
                          left: $(this).position().left
                        }
        );
        //alert($(this).position().top);
      });
      if($("#thumbs").children().position().top == 378){
        $('#input_button_thumbs_prev').attr('disabled','disabled');
        $('#input_button_thumbs_prev').hide();
      }
    }
    else{
      $('#input_button_thumbs_prev').attr('disabled','disabled');
      $('#input_button_thumbs_prev').hide();
    }
  }
  
  function thumbsVidNextPage(){
    $sThumbsAvailable = 0;
    $('#input_button_thumbs_videos_prev').attr('disabled','');
    $('#input_button_thumbs_videos_prev').show();
    
    $iThumbsHeight = $('#thumbs_videos').height();
    $("#thumbs_videos").children().each(function() {
      $(this).offset({
                        top:($(this).position().top - $('#thumbs_videos').height()),
                        left: $(this).position().left
                      }
      );
      if($(this).position().top==1075){
        $sThumbsAvailable = 1;
      }
      else{
        $sThumbsAvailable = 0;
      }
      //alert($(this).position().top);
    });
    if($sThumbsAvailable != 1){
      $('#input_button_thumbs_videos_next').attr('disabled','disabled');
      $('#input_button_thumbs_videos_next').hide();
    }
    else{
      $('#input_button_thumbs_videos_next').attr('disabled','');
      $('#input_button_thumbs_videos_next').show();
    }
  }
  
  function thumbsVidPrevPage(){
    $('#input_button_thumbs_videos_next').attr('disabled','');
    $('#input_button_thumbs_videos_next').show();
    
    if($("#thumbs_videos").children().position().top < 755){
      $iThumbsHeight = $('#thumbs').height();
      $("#thumbs_videos").children().each(function() {
        //alert($(this).position().top);
        $(this).offset({
                          top:($(this).position().top + $('#thumbs_videos').height()),
                          left: $(this).position().left
                        }
        );
        //alert($(this).position().top);
      });
      if($("#thumbs_videos").children().position().top == 755){
        $('#input_button_thumbs_videos_prev').attr('disabled','disabled');
        $('#input_button_thumbs_videos_prev').hide();
      }
    }
    else{
      $('#input_button_thumbs_videos_prev').attr('disabled','disabled');
      $('#input_button_thumbs_videos_prev').hide();
    }
  }
  
  function genYoutube( $yId ){
    $.post( '../ajax/show_youtube.php', {youtubeId: $yId}, function(data) {
      document.getElementById('videoBig').innerHTML = data;
    });
  }
  

  $(document).ready(function() {
    $('.spgImg a').lightBox({txtImage:'Afbeelding',txtOf:'v/d'});

    
    
    $('#input_button_thumbs_prev').attr('disabled','disabled');
    $('#input_button_thumbs_prev').hide();
    $('#input_button_thumbs_videos_prev').attr('disabled','disabled');
    $('#input_button_thumbs_videos_prev').hide();
    
    //$("#thumbs").children().each(function() {
    //  alert($("#thumbs").children().size());
      if($("#thumbs").children().size() > 12){
        $('#input_button_thumbs_next').attr('disabled','');
        $('#input_button_thumbs_next').show();
      }
      else{
        $('#input_button_thumbs_next').attr('disabled','disabled');
        $('#input_button_thumbs_next').hide();
      }
    //});
    
    //$("#thumbs_videos").children().each(function() {
      if($("#thumbs_videos").children().size() > 12){
        $('#input_button_thumbs_videos_next').attr('disabled','');
        $('#input_button_thumbs_videos_next').show();
      }
      else{
        $('#input_button_thumbs_videos_next').attr('disabled','disabled');
        $('#input_button_thumbs_videos_next').hide();
      }
    //});
    
    $('#form_contactformulier').validate({errorPlacement: function() {return true}});
    
    $('#thumbs img').click(function() {
      $('#fotoBig img').attr('src', $(this).attr('src').replace('_thumb1', '_thumb2'));
      $('#fotoBig a').attr('href', $(this).attr('src').replace('_thumb1', ''));
    });
    
    $('#thumbs_videos img').click(function() {
      $('#videoBig iframe').attr('src', $(this).attr('alt'));
    });
    
    
    
    /*
    // Code for on-hover appearing of items in bottom menu
    $('.menu_bottom_item').hover(function(){
      $(this).children('.menu_item_sub_container').show();
    },
    function(){
      $(this).children('.menu_item_sub_container').hide();
    });
    */
  });